About: free base

Premodifier: free
Head noun: base

Same concepts
http://dbpedia.org/resource/Free_base

Broader concepts

label	provenance	confidence
salt	isap:166315399	0.452250
compound of the invention	isap:458273346	0.340003
compound	isap:458273344	0.339210
form	isap:165946457	0.188080
drug	isap:165792318	0.106062

Narrower concepts

label	provenance	confidence
product	isap:76215639	0.260506